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2 Sheets-Sheet l lli Feb. '14, 1928.

0. E. SCHAUER ET AL SPLIT SLEEVE FRICTIONAL REVERSER Filed Deo. 5, 19.25

Si l) Patented Feb. 14, 1928.

UNITED s'rnfijrw rrENT OFFICE.

OZNI E. SCHAUER AND ROVVLAND L. RICKWOOD, OF CINCINNATI, OHIO, ASSIGNORS TO THE CINCINNATI BICKFORD TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORA- TION OF OHIO.

. SPLIT-SLEEVE lFRICTIONAL REVERSER.

Application filed December '.l`his invention relates to motion reversers of the friction type and it proposes/an improved construction particularly adapted for embodiment in drilling machines as a so-called tapping instrumentality.

These devices commonly comprise a drive shaft, two bevel gears loosely journaled coaxial with the drive shaft, a power-delivery shaft arranged at right angles to the drive shaft and carrying a bevel-gear having its opposite sides permanently in mesh with the two driving gears, and friction clutches selectively actuated to secure either of the driving gears to the drive shaft, whereby the gear on the power-delivery shaft selectively may be driven in reverse directions. To permit of bodily movement of the drillhead on the arm it is necessary 'that the drive-gears be bodily movable lengthwise of the drive shaft. y

To the end that frictional reversers of this type may operate freely without binding and without excessive wear on the parts, certain structural characteristics are essential. Among these may be noted (l) the drive-gears must be rotatable with the drive shaft but freely translatable relative thereto, (9) the gears, bearings, clutches, etc., must he kept `generously lubricated, (3) the lubricant must be prevented from escap ing from the parts to be lubricated.

This invention has for an object to provide an improved frictional reverser rigld in construction and which will maintain the parts in true alignment and which admits of being readily made and assembled.

Another object of the invention is so to construct the reverser that good lubrication will be attained and which will, likewise, prevent escape of the lubricant. y

These objects have been attained by einl'iodving in a frictional reverser two relatively short sleeves, splined to the drive shaft, each carrying one of the drive gears and its associated clutch, instead of a single long sleeve carrying both gears. An improved4 arrangement of bearings back of each driving gear (and also between the driving gears) gives each of the sleeves ample support to prevent deflection of the sleeve by `the driving strains, thus the sleeves are maintained freely translatable onthe drive shaft. The two sleeves are spaced apart endwise within the center bearing and this 3, 1925. Serial No. 72,940.

space is surrounded by an annular groove in the bearing which receives the oil passing through the bearing and thrown off the sleeves by centrifugal force. This space between the ends of the sleeves also permits each of the sleeves to be adjusted lengthwise independently of the otherfor purposes later to be explained. An oil duct connects with the annular groove and serves to lead the oil back to the reservoir thereby preventing it from flowing outwardly along the keyway in the shaft. The two sleeves, each being only about one-half as long as the single sleeves heretofore used, are much more eas ily and accurately manufactured and are consequently less costly, therefore, by means of the present invention, a bett-er product available at a substantially reduced cost.

Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with the annexed drawings.

To enable others skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of which Fig. l is a longitudinal section of a frictional motion reverser embodying the present invention. Fig. 2 is a view similar to one-half of Fig. l but showing a modified arrangement of bearings for the driving sleeves. Figs. 3 and 4 are sections on the lines 3-3 and 4 4. respectively of Fig. l. Fig. 5 is alongitudinal section showing a modified oil collecting means to prevent excess quantities of oil from fiowing through the key-way in the drive shaft.

Referring more particularly to the draw ings and especially to Fig. l, the invention is disclosed as embodied in a motion reverser comprising a casing 1 for supporting and positioning the major elements of the device. Transversely arranged driving and driven shafts are rotatably journaled in the casing and the improved motion reverser acts selecu tively to rotate the driven shaft from the driving shaft in reverse directions. Either of the shafts may act as the driver and either may be the driven Shaft but, for convenience cured on the power-delirery shatt of description, let it be considered that power enters' the .devicethrough shaft 2 and flows outwardly therefrom throughshalt The casing 1 is 'l'ormed with a central bearing boss l preferably in alignment Awith the powerdelivery shaft 3. it either side o'l'i the central bearing the easing supports` antifriction bearings 5, 5, ando,l"resifmetively. 'lhe bearings and (j are mounted in caps or plates 'T and t; respectively which telescope into appropriate openings in the opposite end walls ofthe casing l. These caps may'be adjusted axially by draw bolts 9 and limit screws l() Ator alpurpose later to be explained. Vvithin thel bearings 4l, 5 and 5*L is rotatably Ajournaleda sleeve 11 having a splined connection 12 with'a shaft Ay like sleeve 13 is jollirnaledin the bearings et, (l

and "L and is splined to the sha'ltQ at 141-. Loosely jomnaled on thesleeve 11 is a clutch casing 1.5 (forming a part of a clutch l) cui ying abcvel gear 16 maintained permanently .in mesh with. a similar gear 17 seH clutch block 13 secured to the sleeve 11 hasl a portion 13 extending into the clutch casing and an expansible ring 1.) serves, at eertain times, to loch the ,parts 13 and 15 ,together to cause power to be transmitted from the shaft Q, through the sleeve 11, clutch 13- 19-15-and gears 16 and 17 to rotate the shaft 3 in one direction.' A similar clutch, designated generally' as C, carries a bevel gear 20p permanently in mesh with the gear 17Vdiainetrically opposite thegear 16.` When the clutch Cr is rendered eliective, power flows i'rom 'the shatt 2 through clutch C and gear 20 .to the gear 17 to rotate the shaft 3 ina directionloppositeto that caused by the action ofv .thek gear 1.6.

The clutches 13 and C `are of the type shown in United States patent to Schauer No. 756,135 and yeach comprise a casing 153,

driving .block i8, and an expansible -ring"19. A shown in and 4:,1the .ring 19 is s it at and has 'one `end seated against anfabutment 22 fixed to therblocl; 18. The other end ofthe ring engages a cam wall 23 provided by a short roelr-sha'tt Q-t journaled .in the block 13 and, therefore, as the shaft 2d is rotated in one direction thc wall 23 causes the ring 1S) vto be expanded 'to loch together the parts 18*V and 15. A'roclvarm 5,'lixmlv to the shaft 21, carries an adju stable contact screw engaging: the .beveled end 2l' ol' a. f-dide-bar 23 whereby movement of the slide-lf ar causesy aturning motion.` to .he transmittedto the shaft 24, through the arm 25. The slide hars 28 of `tliepelutches B .andV C areslidingly mounted inV ways .29 and 30 lin thesleeres 11 and @respectively Collars 31; and 32, tranlatablymountedon the :sle'evcsll and f13, are attached tothe sliglerbarsel, vjbyi--` screwss and are engaged by shitting torti-s and 34, respectively, se-

cured to a rod 35 slidably mounted in the o able means that niight be vutilize-'d to shift the slide rod -is shown in United States patcntto llausmeyer, Number 1,505,074.

1t is 'to' beobfierved that each sleeve is' journaled in threespaced bearings; one Vat each end and one si'ibstantially midway loetweenvits ends. By -ineans of'th-is construction IaNery rigid reverser is secured 'and one that `will not bind under working pressures. Adjacent the collars 31and 32, the sleeves 11 and 13 areof enlarged diameter; thereby 11u'ovitling shoulders a, I) and c, l` adapted to engagethe inner rings oit the bearings 5, o" and 6,15. respectively. Thus by shifting the caps '7 and 8 inwardly, by the dran' bolts 9, the sleeves 11. and 13 and the parts carried thereby may he adjusted toward the axis ol' the sha-tt to con'ipensate :for 'wear in the bearings and on the gears 1.6, 17 and 20., The adjacent ends ot the sleeves 11 and 13 lare fitted within a bushingr 367 supported by the bearing Tl and these sleeves are spaced apart as indicated by a'. The bushing 36 is formed onits inner surface Awith an annular groove 37 lwhich surrounds the z :inner ends of thesleeves and 4acts to receive Sil neet with the annular groove 37and serve to drain the lubricant backinto the reservoir R provided by the casino. By means oit' this construction the lubricant which is picked up by the gears and rfinally inds its way into the bearing 4.- is prevented from flowing outwardly through the key-Way in the drive-shaft while still vpermitting suflicient oil torcome intocontact with the shaft to adequately lubricate the contactsurfaces bctween the shaft-and the sleeves 11 and 13. Y

Under certain conditions, it-may be advisable to provide the reverser with the modified varrangel'irentot sleeve bearings Vas shown iii-F 2. In this form, each sleeve is supported `by only two bearings; viz, the central bearingI 4l and a singleV bearing 10 sustained lby the casing at the opposite side ol.l the clutch; It Will readjily'beperceived thatthis isa simpler' construction than that shown in Fig. 1, that it is less costly to buildl` and that it'. is easier to assemble.

A furthermodication `is shown in Fig. 5 inavfhich the `sleeve is show-n'assupported wholly heh-ind the friction clutch; the member 'il being util-ized as an oil 'collector `only andno't as a, bearing for the sleeves.

this form, the sleeves are preferablyfformed operate Wg' th annular; groovesY 44; inthe kous;

ing to throw the oil from the sleeves and thereby prevent large quantities of oil from reaching the drive shaft. A duct 45 leads the oil 'trom the grooveslt back into the reservoir.

To prevent escape ot lubricant trom the easing's l each et the end caps 7 and 8 may be formed with an annular groove 4:1 within which is fitted a packing ring 42 which wipes upon the outer periphery of the sleeves ll and 13. These packing,l rings also serve to prevent the entrance ot dust etc. to the easing. Duets 41a lead from the groove il back into the casing to return thereto the lubricant picked up by the packing rings.

From the foregoing, it ,will be perceived that there has been provided an improved trictional motion reverser in which each driving gear is supported upon an individual' sleeve which is more rigidly supported than the single sleeve in prior devices, thereby preventing binding between the sleeve and the drive shaft. Also that the parts are easier an dless costly to manufacture and that the improved device atl'ords better lubrication of the parts without permitting escape oi' the lubricant. i

lVithout further analysis, the foregoing will so fully reveal the gist ofthis invention that others can, by applying current knowledge, readily adapt it for various utilizations by retaining' one or more of the features that, from the standpoint et the prior art, fairly constitute essential characteristics of either the `generic or specific aspects ot this invention and, therefore, such adaptations should be, and are intended to be, comprehcnded within the meaning; and range ot equivalency of the following' elaims:-

Having' thus revealed this inventionr` we claim as new and desire to secure the following combinations and elementsA` or equivalents thereof, by Letters Patent o' the United States l. A motion reverser combining a casing; a first sha'lt extending' through said casing; a second shaft jonrnaled in said casing transversely to said first shaft; a ,Q'ear on said second shaft; two `sears rotatably journaled eoaxial with said lirst shatt and meshing with the lirst named clear; a sleeve intermediate each ot said two gears and said shaft, each et said sleeves simportinp' one of said gears and having' a splined connection with said sha it bearings 'for rotatably supporting said sleeves: means Vtor selectiva-ily engaging each oli saidl tw: e'ufs with its supporting sleeve: and means for axially adjusting;r one oit said sleeves in said casing.

2. A, motion reverser combining a casing; a tirst shaft 'extendiner through said casing; a second sha-tt journaled in said casing transversely to said first shaft; a gear on said second shaft; two gears rotatablyT journaled coaxial with said first shaft and meshing with the ,first named gear; two sleeves splined to said iirst shalt; clutch mechanism between each of said two gears and one oit said sleeves :tor causing said gears to rotate with. said sleeves; al bearing intermediate said two tears ttor the adjacent ends ot said sleeves; and independent bearings back ot' said two gears tor the opposite ends ol said sleeves.

3. A motion reverser con'ibining a casing; a iirstshatt extending' through said casing; a second shat't iournaled in said casing transversely to said first shaft; a gear on said second shaft; two sleeves splined to said tirst shatt; a gear rotatably ionrnaled on each et said sleeves and meshingij with the gear on the second shaft: bearings 'for each ot said sleeves` supported by said casing at opposite 1 sides of the gear thereon; and means selectively to ellcct a drivingconnection between said sleeves and their associated gears.

l. A motion reverser combining a easing; a drive sha'tt cvtcndinntherethrough; a driven shatt; a bevel-grau' on saidv driven shatt; tivo aligg'nef'l sleeves having;` a splined connection wit-liv said drive-shaft; a bevel `gear rotatalilj; journaled on each ot said sleeves and 1neshing' with the lirst named bevel gear at opposite sides thereot; a :friction clutch associated with each oit said sleeves and each adapted to secure one ot said bevel gears to one of said sleeves; means selectively to actuate said clutches to canse said driven shalt to be rotated in reverse directions; and individual means to shift each ot' said sleeves and its associated gear axially in said casing 'to compensate for wear in said bevel gears.

Y A friction reverser combiningr an elongated closed casing; a drive'shatt extendingl therethrough: a driven shaft: two spaced sleeves rotatably journaled in bearings supported by said cisine; and each having a splined connection with said drive shaft; a reversing' mechanism within said casing coin-- prehending' a driving bevel gear rotatablv but non-translatably jonrnaled on each ot said sleeves; an intermediate bevel 2(rear on said driven shaft; a clutch associated with each et said driving bevel ejears to secure .itto its supporting sleeve; and individual means adjustable from without the casina' 'for shitting' each of said sleeves axially to compensatie tor wear in said. bearings and `scars.

(i. AA motion reverser' combining a casing; a lirst shaitt extending therethrough; a secn ond shaft journaled in. said casini: (',ransversely to said .tirstshaft; a bevel lgear on said second shalt: two sleeves splined to said tirst shaft: a driving bevel gear rotatabler journaled on each et said sleeves and meshing with the lirst-named gear; three bearings for each ot said sleeves, one ot said bearings being located adjacent one end oi" said sleeves at the tace-side ot each of said driving,lr bevel-gears, one at the opposite ends et said sleeves and one substantially midfill Waybetween the ends, of said 'sleeves' the last mentioned two bearings being located behind said driving gears; and means for selectively clutching said driving bevel gears eaehto its individual driving sleeve.

7. A motion reverser combining a closed casing vproviding an oil reservoir; a first shaft extending through said casing; a secendshailft jourualed transversely to said iirst shaft; va gear ou said second shaft; a cen tral bearing,sustained by said casing lsubstantially in line with said second shaft; two aligned sleeves rotatably journaled in said easing and each having a translatable but Vnolrrotstable connection with said first shait.v the adjacent ends of said sleeves being journaled in said central bearing; an

annular.chamber Within said central bearing and surrounding the adjacent ends oi' said sleeves and adapted to receive oil thrown'olfby said. sleeves; a drain to return to clutch each et said sleeves to the gear thereon.

8. A motion reverser combining a closed casing providing an oil reservoir a shaftl extendingzthrough said easing; a second shaft journaled transversely to said iirst shaft; tivo aligned sleeves rotatably jour-` naled in said casing with their adjacent ends spaced apart andhaving translatable but non-rotatable connections `with said iirst shaiit; a bevel gear rotatably-journaled on each et said sleeves and 4permanently meshing with a gear on said second shaft; a bearingl member supported by said casing in the region ot the adjacent ends et said sleeves; a bearing bushing Within said member 4and affording a bearing for said sleeves, said bushing being` provided With an oil eollecting chamber adapted to receive oil passing through said sleeve bearings; a drain to return theoil 'from said chamber to the reservoir; and means selectively to clutch saidsleeves to the gear thereon. Y

9. A motion reversercombining a closed casing providing an oil` reservoir; tvvo aligned 'sleeves yindependently journaled in said casing.; a rotating shaft extending through said sleeves and yhav-.ing a splined an oil collector surrounding said shaft `andr the adjacent ends et said sleeves and providinga drainleading back tosaid reser-` voir, said oil collector and drain being adapted to'prevent a substantial quantity oit oil from enteringthe spline in said shaft; a second-shaft;- reversely acting gearconneetiensbet-Ween said seeondshatt and the gears onsaid sleeves; and-means to clutch said sleeves to the gears/thereon-selectively to rotate the second shat't in reverse direc# tio-ns. 4

10. A `motion reverser combining a cas ing; a driving shaft; a driven-slnift ;tvvo sleeves rotatably journaled inl said cas-ing and eaehhaving a splined conlneetionwvith said driving shaitt; a bevel gear von said dri-ven shaft; a bevel gear rotatably jouinaledoli/each oit said sleeves and meshing Withepposite sides ofv the iirst named gear; a friction cluteh'device for. locking each ot lsaid sleeves to the gear journaled thereon;

a clutch actua-ting bar slidingly fitted within a `slideivay in each of said sleeves; and mea-ns to shi'lt said slide bars simultaneously to' cause one ot said clutches tobe'rendered effective to transmit motion and the other to be rendered ineffective.

l1. In amotiojn reverser having a 4closed j j casing 1providing anoil reservoir therefor; a

shaft rotatably mounted inaid casing; a second shaft rotatably mounted in said casing ;4 a pair of sleeves Vjou-rnaled in said 'cas ing. andfsplined oli-said first named shaft. yto rotate therewith, the adjacent ends of said sleeves being axiallyspaeed; means for operatively connecting said second shaft to either ofsaid sleeves and. adapted* t0 be lubricated. by the oil in said reservoir; and an oilcollector surroundingsaid adjacent endsand space whereby anexcessive amount of oil fis prevented vfrom flowing `out the splines in said shaft. f

In l WitnessWhereof, We have hereunto subscribed our naines.

OZNI E. SCHAUER ROVVLAND L. RICKVVOOD.` 

